DetailView onUpdating problem

[LamSoft]

By Double clicking the object detailview, it will auto make a sub-procedure
called XXXXX_Selecting , however I want a sub-procedure to be called while
the detailview is being updated, so that i add a onUpdating="xxx xx" inside
the <asp:DetailView and make a sub in the cs file, but while try to run the
project, it has the following error, is there any other method to make a
onupdating sub rather than i have to write the code myself, thanks.

Error 1 No overload for 'sDS_ServerInfo rmation_Updatin g' matches delegate
'System.Web.UI. WebControls.Sql DataSourceComma ndEventHandler'
C:\Inetpub\wwwr oot\list\listSe verInformation. aspx 35
C:\Inetpub\wwwr oot\list\listSe verInformation. aspx 35 ==>
<asp:SqlDataSou rce.....
UpdateCommand=" UPDATE serverDetail SET location = @location, server_owner =
@server_owner, application = @application, backup_type = @backup_type WHERE
(server_id = (SELECT id FROM serverList WHERE (serverip = @serverip)))"
OnSelecting="sD S_ServerInforma tion_Selecting"
OnUpdating="sDS _ServerInformat ion_Updating">
</asp:SqlDataSour ce>